Mercurial > dedupe

annotate HuffmanSet.cpp @ 49:f8d0ea827db3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Use BitArray.
author Tom Fredrik Blenning Klaussen <bfg@blenning.no>
date Mon, 10 Sep 2012 23:59:46 +0200
parents f711ddb56ae7
children 19b2a2d98788
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
21
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
1 #include "HuffmanString.hpp"
40
f711ddb56ae7 Sort up includes.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 37
diff changeset
2
49
f8d0ea827db3 Use BitArray.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 40
diff changeset
3 #include "FastBitDecoder.hpp"
f8d0ea827db3 Use BitArray.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 40
diff changeset
4 #include "BitDecoder.hpp"
f8d0ea827db3 Use BitArray.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 40
diff changeset
5
40
f711ddb56ae7 Sort up includes.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 37
diff changeset
6 #include "Exception/InvalidDataException.hpp"
28
b2c2c2bf2bbd Refactor Exceptions into a separate directory.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 26
diff changeset
7 #include "Exception/NoSuchValueException.hpp"
21
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
8
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
9 #include <QtCore/QHash>
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
10
26
c0ddc978475a Remove debug info from HuffmanSet.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 21
diff changeset
11 HuffmanSet::HuffmanSet() : cutoff(256), numInserts(0), lut(0)
21
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
12 {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
13 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
14
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
15 void HuffmanSet::setCutoff(uint cutoff)
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
16 {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
17 this->cutoff = cutoff;
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
18 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
19
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
20 QStringList HuffmanSet::chunks(const QString& str)
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
21 {
37
c52a0627337c BUGFIX: Chunking got extra values at beginning and end.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 34
diff changeset
22 return str.split("", QString::SkipEmptyParts);
21
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
23 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
24
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
25 BitDecoder* HuffmanSet::createLut(const QMap<QString, uint>& freqTable)
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
26 {
34
fda70a362ed5 Remove whitespace.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 28
diff changeset
27 QMultiMap<uint, BitDecoder* > freqs;
21
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
28 for(QMap<QString, uint>::const_iterator it = freqTable.begin();
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
29 it != freqTable.end(); ++it) {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
30 freqs.insert(it.value(), new BitDecoder(it.key()));
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
31 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
32
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
33 if (freqs.size() == 1) {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
34 QList<uint> keys = freqs.keys();
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
35 return freqs.take(keys[0]);
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
36 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
37
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
38 QList<uint> keys = freqs.keys();
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
39
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
40 while (freqs.size() >= 2) {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
41 QList<uint> keys = freqs.keys();
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
42
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
43 BitDecoder* v0 = freqs.take(keys[0]);
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
44 BitDecoder* v1 = freqs.take(keys[1]);
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
45
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
46 BitDecoder* n = BitDecoder::merge(v0, v1);
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
47
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
48 freqs.insert(keys[0] + keys[1], n);
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
49 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
50 BitDecoder* retVal = freqs.values()[0];
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
51 return retVal;
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
52 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
53
49
f8d0ea827db3 Use BitArray.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 40
diff changeset
54 QString HuffmanSet::decode(const BitArray& bits) const
21
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
55 {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
56 return lut->decode(bits);
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
57 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
58
49
f8d0ea827db3 Use BitArray.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 40
diff changeset
59 BitArray HuffmanSet::encode(const QString& string, const QMap<QString, BitArray>& encoder)
21
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
60 {
49
f8d0ea827db3 Use BitArray.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 40
diff changeset
61 BitArray retVal;
21
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
62 QStringList c = chunks(string);
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
63 foreach(const QString& fragment, c) {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
64 if (encoder.contains(fragment))
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
65 retVal = BitDecoder::unite(retVal, encoder[fragment]);
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
66 else
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
67 throw InvalidDataException();
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
68 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
69 return retVal;
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
70 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
71
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
72 uint HuffmanSet::totalElements() const
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
73 {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
74 return newStrings.size() + map.size();
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
75 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
76
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
77 void HuffmanSet::rebuild()
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
78 {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
79 QMap<QString, uint> freqTable;
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
80
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
81 foreach(key_t key, map.keys()) {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
82 foreach(const QString& chunk, chunks(decode(map.value(key)))) {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
83 ++freqTable[chunk];
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
84 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
85 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
86 foreach(key_t key, newStrings.keys()) {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
87 foreach(const QString& chunk, chunks(newStrings.value(key))) {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
88 ++freqTable[chunk];
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
89 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
90 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
91
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
92 BitDecoder* newLut = createLut(freqTable);
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
93
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
94 encoder = newLut->createEncoder();
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
95
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
96 foreach(key_t key, map.keys()) {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
97 map.insert(key, encode(decode(map.value(key)), encoder));
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
98 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
99 foreach(key_t key, newStrings.keys()) {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
100 map.insert(key, encode(newStrings.value(key), encoder));
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
101 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
102 numInserts = 0;
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
103 delete lut;
49
f8d0ea827db3 Use BitArray.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 40
diff changeset
104 /*
f8d0ea827db3 Use BitArray.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 40
diff changeset
105 lut = new FastBitDecoder(encoder);
f8d0ea827db3 Use BitArray.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 40
diff changeset
106 delete newLut;
f8d0ea827db3 Use BitArray.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 40
diff changeset
107 */
21
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
108 lut = newLut;
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
109 newStrings.clear();
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
110 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
111
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
112 bool HuffmanSet::contains(key_t key) const
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
113 {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
114 return newStrings.contains(key) || map.contains(key);
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
115 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
116
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
117 HuffmanSet::key_t HuffmanSet::hash(const QString& str)
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
118 {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
119 key_t key = qHash(str);
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
120 while (contains(key) && value(key) != str)
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
121 ++key;
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
122 return key;
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
123 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
124
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
125 HuffmanSet::key_t HuffmanSet::insert(const QString& str)
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
126 {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
127 key_t key = hash(str);
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
128 if (!contains(key)) {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
129 try {
49
f8d0ea827db3 Use BitArray.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents: 40
diff changeset
130 BitArray bits = encode(str, encoder);
21
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
131 map.insert(key, bits);
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
132 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
133 catch (InvalidDataException& e) {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
134 newStrings.insert(key, str);
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
135 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
136 if (++numInserts >= cutoff) {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
137 rebuild();
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
138 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
139 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
140 return key;
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
141 }
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
142
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
143 QString HuffmanSet::value(key_t key) const
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
144 {
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
145 if (map.contains(key))
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
146 return decode(map.value(key));
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
147 if (newStrings.contains(key))
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
148 return newStrings.value(key);
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
149 throw NoSuchValueException();
3bcdb8bb6914 Huffman representations.
Tom Fredrik Blenning Klaussen <bfg@blenning.no>
parents:
diff changeset
150 }